最新FCKEditor ASP上传绕过漏洞

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exploiut-db：

, P; r7 |: }# K4 @FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
4 f7 ]" B7 n  o, x% E* ^- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
& R. a: ]* p- ]8 }- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
dealing with the duplicate files. As a result, it is possible to bypass
the protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
In “config.asp”, wherever you have:
3 ]" C4 S. U# _' \) W  W      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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php测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
  \" f8 P( M/ L& U- Y5 W5 b$ r+ l! O因为结合了之前二次上传的漏洞，所以先上传任意内容的文件：asd.asp.txt
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0 L9 l2 ?$ A4 Wburpsuite上传包并修改，repeater
7 D9 u; q9 v) t5 X6 _  w- N* }& u名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp
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如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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